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s3: Fix precondition failed in CopyObjectPart when src is encrypted (#7276)

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CopyObject precondition checks into GetObjectReader
in order to perform SSE-C pre-condition checks using the
last 32 bytes of encrypted ETag rather than the decrypted
ETag

This also necessitates moving precondition checks for
gateways to gateway layer rather than object handler check
This commit is contained in:
Anis Elleuch
2019-03-06 21:38:41 +01:00
committed by kannappanr
parent 39ddb78c75
commit b05825ffe8
14 changed files with 134 additions and 44 deletions
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6
cmd/gateway/gcs/gateway-gcs.go
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@@ -753,7 +753,7 @@ func (l *gcsGateway) GetObjectNInfo(ctx context.Context, bucket, object string,
// Setup cleanup function to cause the above go-routine to
// exit in case of partial read
pipeCloser := func() { pr.Close() }
return minio.NewGetObjectReaderFromReader(pr, objInfo, pipeCloser), nil
return minio.NewGetObjectReaderFromReader(pr, objInfo, opts.CheckCopyPrecondFn, pipeCloser)
}
// GetObject - reads an object from GCS. Supports additional
@@ -929,7 +929,9 @@ func (l *gcsGateway) PutObject(ctx context.Context, bucket string, key string, r
// CopyObject - Copies a blob from source container to destination container.
func (l *gcsGateway) CopyObject(ctx context.Context, srcBucket string, srcObject string, destBucket string, destObject string,
srcInfo minio.ObjectInfo, srcOpts, dstOpts minio.ObjectOptions) (minio.ObjectInfo, error) {
if srcOpts.CheckCopyPrecondFn != nil && srcOpts.CheckCopyPrecondFn(srcInfo, "") {
return minio.ObjectInfo{}, minio.PreConditionFailed{}
}
src := l.client.Bucket(srcBucket).Object(srcObject)
dst := l.client.Bucket(destBucket).Object(destObject)